Remove the current content type from the options list

Thanks for this module.

On the first screen where you select the destination content type, the current content type is available in the select options box. That's because this part of the code isn't working:

$key = array_search($form['current_type']['#value'], $types);
if ($key !== FALSE) unset($types[$key]);

The attached patch fixes this bug - and a couple of typos